./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0a12aada2256a7483e8803a0f1fb8477c858b141679e1395c89cdfba20292c4b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:53:33,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:53:33,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:53:33,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:53:33,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:53:33,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:53:33,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:53:33,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:53:33,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:53:33,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:53:33,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:53:33,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:53:33,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:53:33,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:53:33,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:53:33,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:53:33,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:53:33,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:53:33,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:53:33,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:53:33,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:53:33,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:53:33,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:53:33,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:53:33,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:53:33,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:53:33,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:53:33,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:53:33,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:53:33,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:53:33,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:53:33,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:53:33,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:53:33,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:53:33,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:53:33,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:53:33,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:53:33,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:53:33,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:53:33,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:53:33,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:53:33,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:53:33,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:53:33,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:53:33,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:53:33,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:53:33,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:53:33,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:53:33,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:53:33,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:53:33,817 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:53:33,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:53:33,818 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:53:33,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:53:33,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:53:33,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:53:33,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:53:33,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:53:33,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:53:33,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:53:33,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:53:33,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:53:33,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:53:33,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:53:33,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:53:33,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:53:33,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:53:33,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:53:33,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:53:33,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:53:33,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:53:33,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:53:33,822 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:53:33,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:53:33,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:53:33,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:53:33,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a12aada2256a7483e8803a0f1fb8477c858b141679e1395c89cdfba20292c4b [2021-12-21 14:53:34,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:53:34,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:53:34,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:53:34,022 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:53:34,023 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:53:34,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c [2021-12-21 14:53:34,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74a11b9cf/8cbe2d7787c2449a9307a3e236ae2fb7/FLAG783daba21 [2021-12-21 14:53:34,421 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:53:34,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c [2021-12-21 14:53:34,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74a11b9cf/8cbe2d7787c2449a9307a3e236ae2fb7/FLAG783daba21 [2021-12-21 14:53:34,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74a11b9cf/8cbe2d7787c2449a9307a3e236ae2fb7 [2021-12-21 14:53:34,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:53:34,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:53:34,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:53:34,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:53:34,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:53:34,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381b0dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34, skipping insertion in model container [2021-12-21 14:53:34,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:53:34,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:53:35,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c[911,924] [2021-12-21 14:53:35,076 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c[8416,8429] [2021-12-21 14:53:35,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:53:35,122 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:53:35,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c[911,924] [2021-12-21 14:53:35,147 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.06.cil-1.c[8416,8429] [2021-12-21 14:53:35,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:53:35,188 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:53:35,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35 WrapperNode [2021-12-21 14:53:35,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:53:35,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:53:35,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:53:35,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:53:35,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,244 INFO L137 Inliner]: procedures = 67, calls = 80, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 735 [2021-12-21 14:53:35,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:53:35,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:53:35,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:53:35,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:53:35,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:53:35,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:53:35,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:53:35,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:53:35,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (1/1) ... [2021-12-21 14:53:35,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:53:35,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:53:35,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 14:53:35,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 14:53:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:53:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:53:35,346 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:53:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-21 14:53:35,346 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-21 14:53:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:53:35,347 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:53:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:53:35,347 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:53:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-21 14:53:35,347 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-21 14:53:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:53:35,347 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:53:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:53:35,348 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:53:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-21 14:53:35,348 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-21 14:53:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-21 14:53:35,348 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-21 14:53:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-21 14:53:35,349 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-21 14:53:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:53:35,349 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:53:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:53:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:53:35,349 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:53:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-21 14:53:35,350 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-21 14:53:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:53:35,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:53:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:53:35,350 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:53:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-21 14:53:35,350 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-21 14:53:35,426 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:53:35,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:53:35,796 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-21 14:53:35,797 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-21 14:53:35,836 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:53:35,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:53:35,843 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-21 14:53:35,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:53:35 BoogieIcfgContainer [2021-12-21 14:53:35,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:53:35,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:53:35,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:53:35,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:53:35,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:53:34" (1/3) ... [2021-12-21 14:53:35,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c641fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:53:35, skipping insertion in model container [2021-12-21 14:53:35,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:35" (2/3) ... [2021-12-21 14:53:35,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c641fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:53:35, skipping insertion in model container [2021-12-21 14:53:35,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:53:35" (3/3) ... [2021-12-21 14:53:35,852 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.06.cil-1.c [2021-12-21 14:53:35,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:53:35,857 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:53:35,920 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:53:35,924 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 14:53:35,925 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:53:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 357 states, 301 states have (on average 1.611295681063123) internal successors, (485), 309 states have internal predecessors, (485), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-21 14:53:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:53:35,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:35,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:35,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:35,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1638147849, now seen corresponding path program 1 times [2021-12-21 14:53:35,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:35,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243661082] [2021-12-21 14:53:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:35,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:53:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:53:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:53:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:36,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:36,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243661082] [2021-12-21 14:53:36,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243661082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:36,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:36,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:53:36,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506855178] [2021-12-21 14:53:36,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:36,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:53:36,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:53:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:53:36,349 INFO L87 Difference]: Start difference. First operand has 357 states, 301 states have (on average 1.611295681063123) internal successors, (485), 309 states have internal predecessors, (485), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:37,140 INFO L93 Difference]: Finished difference Result 842 states and 1321 transitions. [2021-12-21 14:53:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:37,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-21 14:53:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:37,152 INFO L225 Difference]: With dead ends: 842 [2021-12-21 14:53:37,153 INFO L226 Difference]: Without dead ends: 497 [2021-12-21 14:53:37,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:53:37,159 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 665 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 2085 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:37,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 2085 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:53:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-12-21 14:53:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 458. [2021-12-21 14:53:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 383 states have (on average 1.4986945169712793) internal successors, (574), 390 states have internal predecessors, (574), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-21 14:53:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 677 transitions. [2021-12-21 14:53:37,222 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 677 transitions. Word has length 65 [2021-12-21 14:53:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:37,223 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 677 transitions. [2021-12-21 14:53:37,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 677 transitions. [2021-12-21 14:53:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:53:37,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:37,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:37,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:53:37,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash -977930807, now seen corresponding path program 1 times [2021-12-21 14:53:37,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:37,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363381527] [2021-12-21 14:53:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:37,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:53:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:53:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:53:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:37,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:37,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363381527] [2021-12-21 14:53:37,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363381527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:37,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:37,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:53:37,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450864281] [2021-12-21 14:53:37,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:37,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:53:37,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:53:37,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:53:37,348 INFO L87 Difference]: Start difference. First operand 458 states and 677 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:38,165 INFO L93 Difference]: Finished difference Result 855 states and 1243 transitions. [2021-12-21 14:53:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 14:53:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-21 14:53:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:38,169 INFO L225 Difference]: With dead ends: 855 [2021-12-21 14:53:38,170 INFO L226 Difference]: Without dead ends: 646 [2021-12-21 14:53:38,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-21 14:53:38,171 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 1000 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:38,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 2206 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:53:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-12-21 14:53:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 570. [2021-12-21 14:53:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 473 states have (on average 1.4799154334038056) internal successors, (700), 482 states have internal predecessors, (700), 64 states have call successors, (64), 29 states have call predecessors, (64), 31 states have return successors, (73), 62 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-21 14:53:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 837 transitions. [2021-12-21 14:53:38,217 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 837 transitions. Word has length 65 [2021-12-21 14:53:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:38,217 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 837 transitions. [2021-12-21 14:53:38,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 837 transitions. [2021-12-21 14:53:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:53:38,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:38,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:38,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:53:38,223 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:38,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1288450379, now seen corresponding path program 1 times [2021-12-21 14:53:38,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:38,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937644427] [2021-12-21 14:53:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:38,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:38,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:38,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:38,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:38,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:38,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:53:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:38,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:53:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:38,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:53:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:38,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:38,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937644427] [2021-12-21 14:53:38,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937644427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:38,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:38,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 14:53:38,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486997668] [2021-12-21 14:53:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:38,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:53:38,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:53:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:53:38,371 INFO L87 Difference]: Start difference. First operand 570 states and 837 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-21 14:53:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:39,981 INFO L93 Difference]: Finished difference Result 2116 states and 3035 transitions. [2021-12-21 14:53:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 14:53:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-21 14:53:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:39,994 INFO L225 Difference]: With dead ends: 2116 [2021-12-21 14:53:39,994 INFO L226 Difference]: Without dead ends: 1783 [2021-12-21 14:53:39,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 14:53:39,996 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 2810 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2828 SdHoareTripleChecker+Valid, 2536 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:39,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2828 Valid, 2536 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 1720 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:53:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-12-21 14:53:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1623. [2021-12-21 14:53:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1321 states have (on average 1.3959121877365632) internal successors, (1844), 1345 states have internal predecessors, (1844), 174 states have call successors, (174), 112 states have call predecessors, (174), 126 states have return successors, (206), 168 states have call predecessors, (206), 170 states have call successors, (206) [2021-12-21 14:53:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 2224 transitions. [2021-12-21 14:53:40,058 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 2224 transitions. Word has length 65 [2021-12-21 14:53:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:40,059 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 2224 transitions. [2021-12-21 14:53:40,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-21 14:53:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 2224 transitions. [2021-12-21 14:53:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:53:40,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:40,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:40,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:53:40,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1688769959, now seen corresponding path program 1 times [2021-12-21 14:53:40,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:40,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830575811] [2021-12-21 14:53:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:40,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 14:53:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 14:53:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:40,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:40,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830575811] [2021-12-21 14:53:40,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830575811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:40,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:40,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 14:53:40,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335823492] [2021-12-21 14:53:40,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:40,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:53:40,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:53:40,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:53:40,155 INFO L87 Difference]: Start difference. First operand 1623 states and 2224 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 14:53:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:41,525 INFO L93 Difference]: Finished difference Result 5147 states and 7106 transitions. [2021-12-21 14:53:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 14:53:41,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-21 14:53:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:41,533 INFO L225 Difference]: With dead ends: 5147 [2021-12-21 14:53:41,534 INFO L226 Difference]: Without dead ends: 2028 [2021-12-21 14:53:41,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 14:53:41,567 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 3251 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3269 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:41,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3269 Valid, 2248 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:53:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-12-21 14:53:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1824. [2021-12-21 14:53:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1452 states have (on average 1.3526170798898072) internal successors, (1964), 1478 states have internal predecessors, (1964), 214 states have call successors, (214), 140 states have call predecessors, (214), 156 states have return successors, (250), 208 states have call predecessors, (250), 210 states have call successors, (250) [2021-12-21 14:53:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 2428 transitions. [2021-12-21 14:53:41,638 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 2428 transitions. Word has length 66 [2021-12-21 14:53:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:41,639 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 2428 transitions. [2021-12-21 14:53:41,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 14:53:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 2428 transitions. [2021-12-21 14:53:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:53:41,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:41,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:41,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:53:41,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash -425793394, now seen corresponding path program 1 times [2021-12-21 14:53:41,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:41,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534042032] [2021-12-21 14:53:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:41,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:41,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:41,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:41,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:41,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:41,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:41,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 14:53:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:41,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:53:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:41,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:53:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:53:41,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534042032] [2021-12-21 14:53:41,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534042032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:41,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:41,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:53:41,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424587983] [2021-12-21 14:53:41,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:41,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:53:41,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:53:41,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:53:41,773 INFO L87 Difference]: Start difference. First operand 1824 states and 2428 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:53:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:42,417 INFO L93 Difference]: Finished difference Result 3647 states and 4869 transitions. [2021-12-21 14:53:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:53:42,417 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-21 14:53:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:42,424 INFO L225 Difference]: With dead ends: 3647 [2021-12-21 14:53:42,425 INFO L226 Difference]: Without dead ends: 2066 [2021-12-21 14:53:42,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:53:42,429 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 617 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:42,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 2176 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:53:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-12-21 14:53:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1884. [2021-12-21 14:53:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1500 states have (on average 1.3373333333333333) internal successors, (2006), 1526 states have internal predecessors, (2006), 214 states have call successors, (214), 140 states have call predecessors, (214), 168 states have return successors, (262), 220 states have call predecessors, (262), 210 states have call successors, (262) [2021-12-21 14:53:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2482 transitions. [2021-12-21 14:53:42,487 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2482 transitions. Word has length 91 [2021-12-21 14:53:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:42,487 INFO L470 AbstractCegarLoop]: Abstraction has 1884 states and 2482 transitions. [2021-12-21 14:53:42,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:53:42,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2482 transitions. [2021-12-21 14:53:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:53:42,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:42,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:42,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:53:42,489 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash 18107280, now seen corresponding path program 1 times [2021-12-21 14:53:42,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:42,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672058872] [2021-12-21 14:53:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:42,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 14:53:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:53:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:53:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:53:42,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:42,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672058872] [2021-12-21 14:53:42,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672058872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:42,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:42,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:53:42,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315161551] [2021-12-21 14:53:42,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:42,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:53:42,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:53:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:53:42,580 INFO L87 Difference]: Start difference. First operand 1884 states and 2482 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:43,326 INFO L93 Difference]: Finished difference Result 3444 states and 4533 transitions. [2021-12-21 14:53:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 14:53:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-21 14:53:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:43,333 INFO L225 Difference]: With dead ends: 3444 [2021-12-21 14:53:43,333 INFO L226 Difference]: Without dead ends: 2036 [2021-12-21 14:53:43,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-12-21 14:53:43,336 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 1234 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:43,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 1626 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:53:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-12-21 14:53:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1668. [2021-12-21 14:53:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1336 states have (on average 1.341317365269461) internal successors, (1792), 1357 states have internal predecessors, (1792), 186 states have call successors, (186), 121 states have call predecessors, (186), 144 states have return successors, (223), 191 states have call predecessors, (223), 182 states have call successors, (223) [2021-12-21 14:53:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2201 transitions. [2021-12-21 14:53:43,387 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2201 transitions. Word has length 91 [2021-12-21 14:53:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:43,388 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 2201 transitions. [2021-12-21 14:53:43,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2201 transitions. [2021-12-21 14:53:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:53:43,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:43,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:43,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:53:43,389 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:43,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:43,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1957269326, now seen corresponding path program 1 times [2021-12-21 14:53:43,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:43,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819836879] [2021-12-21 14:53:43,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:43,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 14:53:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:53:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:53:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:53:43,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:43,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819836879] [2021-12-21 14:53:43,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819836879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:43,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:43,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:43,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082388515] [2021-12-21 14:53:43,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:43,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:43,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:43,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:43,459 INFO L87 Difference]: Start difference. First operand 1668 states and 2201 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 14:53:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:43,866 INFO L93 Difference]: Finished difference Result 4810 states and 6369 transitions. [2021-12-21 14:53:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:53:43,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-21 14:53:43,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:43,879 INFO L225 Difference]: With dead ends: 4810 [2021-12-21 14:53:43,880 INFO L226 Difference]: Without dead ends: 3386 [2021-12-21 14:53:43,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:53:43,884 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 1396 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:43,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1424 Valid, 1091 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:53:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-12-21 14:53:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3092. [2021-12-21 14:53:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3092 states, 2449 states have (on average 1.3033891384238465) internal successors, (3192), 2499 states have internal predecessors, (3192), 347 states have call successors, (347), 234 states have call predecessors, (347), 294 states have return successors, (497), 361 states have call predecessors, (497), 343 states have call successors, (497) [2021-12-21 14:53:43,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3092 states to 3092 states and 4036 transitions. [2021-12-21 14:53:43,991 INFO L78 Accepts]: Start accepts. Automaton has 3092 states and 4036 transitions. Word has length 91 [2021-12-21 14:53:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:43,991 INFO L470 AbstractCegarLoop]: Abstraction has 3092 states and 4036 transitions. [2021-12-21 14:53:43,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 14:53:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3092 states and 4036 transitions. [2021-12-21 14:53:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:53:43,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:43,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:43,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:53:43,993 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:43,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:43,994 INFO L85 PathProgramCache]: Analyzing trace with hash 899431248, now seen corresponding path program 1 times [2021-12-21 14:53:43,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:43,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434958031] [2021-12-21 14:53:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:43,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 14:53:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:53:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:53:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:53:44,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:44,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434958031] [2021-12-21 14:53:44,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434958031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:44,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:44,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:53:44,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611464178] [2021-12-21 14:53:44,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:44,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:53:44,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:53:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:53:44,076 INFO L87 Difference]: Start difference. First operand 3092 states and 4036 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:44,413 INFO L93 Difference]: Finished difference Result 4663 states and 6036 transitions. [2021-12-21 14:53:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 14:53:44,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-21 14:53:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:44,420 INFO L225 Difference]: With dead ends: 4663 [2021-12-21 14:53:44,420 INFO L226 Difference]: Without dead ends: 1815 [2021-12-21 14:53:44,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:53:44,425 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 534 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:44,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1384 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:53:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-12-21 14:53:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1668. [2021-12-21 14:53:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1336 states have (on average 1.313622754491018) internal successors, (1755), 1357 states have internal predecessors, (1755), 186 states have call successors, (186), 121 states have call predecessors, (186), 144 states have return successors, (223), 191 states have call predecessors, (223), 182 states have call successors, (223) [2021-12-21 14:53:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2164 transitions. [2021-12-21 14:53:44,505 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2164 transitions. Word has length 91 [2021-12-21 14:53:44,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:44,505 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 2164 transitions. [2021-12-21 14:53:44,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2164 transitions. [2021-12-21 14:53:44,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 14:53:44,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:44,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:44,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:53:44,507 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:44,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:44,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1793087749, now seen corresponding path program 1 times [2021-12-21 14:53:44,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:44,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653286418] [2021-12-21 14:53:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:44,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 14:53:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:53:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 14:53:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:53:44,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:44,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653286418] [2021-12-21 14:53:44,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653286418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:44,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:44,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:53:44,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32652500] [2021-12-21 14:53:44,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:44,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:53:44,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:44,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:53:44,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:53:44,580 INFO L87 Difference]: Start difference. First operand 1668 states and 2164 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:53:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:45,626 INFO L93 Difference]: Finished difference Result 4604 states and 5968 transitions. [2021-12-21 14:53:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 14:53:45,627 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-21 14:53:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:45,640 INFO L225 Difference]: With dead ends: 4604 [2021-12-21 14:53:45,640 INFO L226 Difference]: Without dead ends: 3180 [2021-12-21 14:53:45,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-21 14:53:45,646 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 1607 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:45,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 1918 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:53:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-12-21 14:53:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3018. [2021-12-21 14:53:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3018 states, 2364 states have (on average 1.259306260575296) internal successors, (2977), 2407 states have internal predecessors, (2977), 358 states have call successors, (358), 228 states have call predecessors, (358), 294 states have return successors, (500), 385 states have call predecessors, (500), 354 states have call successors, (500) [2021-12-21 14:53:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3835 transitions. [2021-12-21 14:53:45,773 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3835 transitions. Word has length 92 [2021-12-21 14:53:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:45,774 INFO L470 AbstractCegarLoop]: Abstraction has 3018 states and 3835 transitions. [2021-12-21 14:53:45,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:53:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3835 transitions. [2021-12-21 14:53:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:53:45,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:45,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:45,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:53:45,779 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1409205542, now seen corresponding path program 1 times [2021-12-21 14:53:45,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:45,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715962823] [2021-12-21 14:53:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:45,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:53:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:53:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:53:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:53:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:45,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:45,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715962823] [2021-12-21 14:53:45,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715962823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:45,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:45,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:53:45,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415172385] [2021-12-21 14:53:45,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:45,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:53:45,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:45,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:53:45,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:53:45,859 INFO L87 Difference]: Start difference. First operand 3018 states and 3835 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:46,561 INFO L93 Difference]: Finished difference Result 3319 states and 4313 transitions. [2021-12-21 14:53:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:53:46,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:53:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:46,571 INFO L225 Difference]: With dead ends: 3319 [2021-12-21 14:53:46,571 INFO L226 Difference]: Without dead ends: 3094 [2021-12-21 14:53:46,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:53:46,572 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 703 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:46,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 1010 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:53:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-12-21 14:53:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 3018. [2021-12-21 14:53:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3018 states, 2364 states have (on average 1.2588832487309645) internal successors, (2976), 2407 states have internal predecessors, (2976), 358 states have call successors, (358), 228 states have call predecessors, (358), 294 states have return successors, (500), 385 states have call predecessors, (500), 354 states have call successors, (500) [2021-12-21 14:53:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3834 transitions. [2021-12-21 14:53:46,691 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3834 transitions. Word has length 113 [2021-12-21 14:53:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:46,691 INFO L470 AbstractCegarLoop]: Abstraction has 3018 states and 3834 transitions. [2021-12-21 14:53:46,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3834 transitions. [2021-12-21 14:53:46,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:53:46,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:46,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:46,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:53:46,695 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash 457503132, now seen corresponding path program 1 times [2021-12-21 14:53:46,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:46,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653802321] [2021-12-21 14:53:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:46,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:53:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:53:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:53:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:53:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:46,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:46,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653802321] [2021-12-21 14:53:46,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653802321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:46,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:46,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:46,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256079825] [2021-12-21 14:53:46,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:46,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:46,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:46,783 INFO L87 Difference]: Start difference. First operand 3018 states and 3834 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:48,323 INFO L93 Difference]: Finished difference Result 3629 states and 4814 transitions. [2021-12-21 14:53:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:48,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:53:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:48,335 INFO L225 Difference]: With dead ends: 3629 [2021-12-21 14:53:48,335 INFO L226 Difference]: Without dead ends: 3409 [2021-12-21 14:53:48,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:48,337 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1096 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 2192 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:48,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 2192 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:53:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-12-21 14:53:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3246. [2021-12-21 14:53:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3246 states, 2567 states have (on average 1.2843786521231009) internal successors, (3297), 2612 states have internal predecessors, (3297), 375 states have call successors, (375), 234 states have call predecessors, (375), 302 states have return successors, (524), 403 states have call predecessors, (524), 371 states have call successors, (524) [2021-12-21 14:53:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4196 transitions. [2021-12-21 14:53:48,520 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4196 transitions. Word has length 113 [2021-12-21 14:53:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:48,521 INFO L470 AbstractCegarLoop]: Abstraction has 3246 states and 4196 transitions. [2021-12-21 14:53:48,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4196 transitions. [2021-12-21 14:53:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:53:48,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:48,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:48,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:53:48,528 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1808888350, now seen corresponding path program 1 times [2021-12-21 14:53:48,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:48,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125112345] [2021-12-21 14:53:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:48,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:48,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:48,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:53:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:48,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:53:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:48,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:53:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:48,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:53:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:48,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:48,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125112345] [2021-12-21 14:53:48,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125112345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:48,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:48,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:48,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635211103] [2021-12-21 14:53:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:48,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:48,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:48,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:48,637 INFO L87 Difference]: Start difference. First operand 3246 states and 4196 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:50,233 INFO L93 Difference]: Finished difference Result 4403 states and 6036 transitions. [2021-12-21 14:53:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:50,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:53:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:50,247 INFO L225 Difference]: With dead ends: 4403 [2021-12-21 14:53:50,248 INFO L226 Difference]: Without dead ends: 3957 [2021-12-21 14:53:50,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:50,253 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 1075 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:50,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 2219 Invalid, 2137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:53:50,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2021-12-21 14:53:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3666. [2021-12-21 14:53:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2943 states have (on average 1.3183826027862726) internal successors, (3880), 2990 states have internal predecessors, (3880), 405 states have call successors, (405), 246 states have call predecessors, (405), 316 states have return successors, (564), 435 states have call predecessors, (564), 401 states have call successors, (564) [2021-12-21 14:53:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 4849 transitions. [2021-12-21 14:53:50,421 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 4849 transitions. Word has length 113 [2021-12-21 14:53:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:50,421 INFO L470 AbstractCegarLoop]: Abstraction has 3666 states and 4849 transitions. [2021-12-21 14:53:50,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 4849 transitions. [2021-12-21 14:53:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:53:50,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:50,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:50,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:53:50,424 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash 189913436, now seen corresponding path program 1 times [2021-12-21 14:53:50,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:50,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824723012] [2021-12-21 14:53:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:50,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:53:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:53:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:53:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:53:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:50,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:50,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824723012] [2021-12-21 14:53:50,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824723012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:50,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:50,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:50,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078874220] [2021-12-21 14:53:50,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:50,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:50,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:50,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:50,498 INFO L87 Difference]: Start difference. First operand 3666 states and 4849 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:52,138 INFO L93 Difference]: Finished difference Result 5917 states and 8421 transitions. [2021-12-21 14:53:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:52,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:53:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:52,152 INFO L225 Difference]: With dead ends: 5917 [2021-12-21 14:53:52,152 INFO L226 Difference]: Without dead ends: 5051 [2021-12-21 14:53:52,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:52,156 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 1074 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:52,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 2215 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 14:53:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-12-21 14:53:52,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 4508. [2021-12-21 14:53:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4508 states, 3697 states have (on average 1.3654314308899107) internal successors, (5048), 3748 states have internal predecessors, (5048), 465 states have call successors, (465), 270 states have call predecessors, (465), 344 states have return successors, (650), 499 states have call predecessors, (650), 461 states have call successors, (650) [2021-12-21 14:53:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4508 states to 4508 states and 6163 transitions. [2021-12-21 14:53:52,360 INFO L78 Accepts]: Start accepts. Automaton has 4508 states and 6163 transitions. Word has length 113 [2021-12-21 14:53:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:52,361 INFO L470 AbstractCegarLoop]: Abstraction has 4508 states and 6163 transitions. [2021-12-21 14:53:52,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:52,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4508 states and 6163 transitions. [2021-12-21 14:53:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:53:52,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:52,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:52,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:53:52,365 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:52,365 INFO L85 PathProgramCache]: Analyzing trace with hash -693595554, now seen corresponding path program 1 times [2021-12-21 14:53:52,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:52,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969481215] [2021-12-21 14:53:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:52,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:53:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:53:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:53:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:53:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:52,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:52,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969481215] [2021-12-21 14:53:52,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969481215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:52,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:52,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:52,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627907626] [2021-12-21 14:53:52,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:52,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:52,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:52,471 INFO L87 Difference]: Start difference. First operand 4508 states and 6163 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:54,180 INFO L93 Difference]: Finished difference Result 8943 states and 13205 transitions. [2021-12-21 14:53:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:54,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:53:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:54,201 INFO L225 Difference]: With dead ends: 8943 [2021-12-21 14:53:54,201 INFO L226 Difference]: Without dead ends: 7235 [2021-12-21 14:53:54,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:54,210 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1074 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:54,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 2212 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:53:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7235 states. [2021-12-21 14:53:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7235 to 6198. [2021-12-21 14:53:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6198 states, 5211 states have (on average 1.4185377086931492) internal successors, (7392), 5270 states have internal predecessors, (7392), 585 states have call successors, (585), 318 states have call predecessors, (585), 400 states have return successors, (840), 627 states have call predecessors, (840), 581 states have call successors, (840) [2021-12-21 14:53:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6198 states to 6198 states and 8817 transitions. [2021-12-21 14:53:54,489 INFO L78 Accepts]: Start accepts. Automaton has 6198 states and 8817 transitions. Word has length 113 [2021-12-21 14:53:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:54,489 INFO L470 AbstractCegarLoop]: Abstraction has 6198 states and 8817 transitions. [2021-12-21 14:53:54,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 6198 states and 8817 transitions. [2021-12-21 14:53:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:53:54,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:54,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:54,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:53:54,494 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:54,494 INFO L85 PathProgramCache]: Analyzing trace with hash -722095844, now seen corresponding path program 1 times [2021-12-21 14:53:54,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:54,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395179355] [2021-12-21 14:53:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:54,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:53:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:53:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:53:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:53:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:54,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:54,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395179355] [2021-12-21 14:53:54,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395179355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:54,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:54,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:54,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137117635] [2021-12-21 14:53:54,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:54,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:54,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:54,573 INFO L87 Difference]: Start difference. First operand 6198 states and 8817 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:56,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:56,425 INFO L93 Difference]: Finished difference Result 14993 states and 22829 transitions. [2021-12-21 14:53:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:56,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:53:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:56,454 INFO L225 Difference]: With dead ends: 14993 [2021-12-21 14:53:56,455 INFO L226 Difference]: Without dead ends: 11595 [2021-12-21 14:53:56,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:56,465 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 1074 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:56,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 2209 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:53:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11595 states. [2021-12-21 14:53:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11595 to 9592. [2021-12-21 14:53:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9592 states, 8253 states have (on average 1.4661335272022296) internal successors, (12100), 8328 states have internal predecessors, (12100), 825 states have call successors, (825), 414 states have call predecessors, (825), 512 states have return successors, (1274), 883 states have call predecessors, (1274), 821 states have call successors, (1274) [2021-12-21 14:53:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9592 states to 9592 states and 14199 transitions. [2021-12-21 14:53:56,881 INFO L78 Accepts]: Start accepts. Automaton has 9592 states and 14199 transitions. Word has length 113 [2021-12-21 14:53:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:56,881 INFO L470 AbstractCegarLoop]: Abstraction has 9592 states and 14199 transitions. [2021-12-21 14:53:56,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 9592 states and 14199 transitions. [2021-12-21 14:53:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:53:56,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:56,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:56,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:53:56,887 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1632289438, now seen corresponding path program 1 times [2021-12-21 14:53:56,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:56,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568905306] [2021-12-21 14:53:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:56,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:53:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:53:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:53:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:53:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:56,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:56,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568905306] [2021-12-21 14:53:56,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568905306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:56,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:56,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:56,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933685356] [2021-12-21 14:53:56,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:56,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:56,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:56,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:56,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:56,950 INFO L87 Difference]: Start difference. First operand 9592 states and 14199 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:58,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:58,224 INFO L93 Difference]: Finished difference Result 18498 states and 28638 transitions. [2021-12-21 14:53:58,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:53:58,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:53:58,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:58,256 INFO L225 Difference]: With dead ends: 18498 [2021-12-21 14:53:58,256 INFO L226 Difference]: Without dead ends: 11704 [2021-12-21 14:53:58,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:53:58,275 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 881 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:58,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 1323 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:53:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11704 states. [2021-12-21 14:53:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11704 to 9592. [2021-12-21 14:53:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9592 states, 8253 states have (on average 1.4621349812189506) internal successors, (12067), 8328 states have internal predecessors, (12067), 825 states have call successors, (825), 414 states have call predecessors, (825), 512 states have return successors, (1274), 883 states have call predecessors, (1274), 821 states have call successors, (1274) [2021-12-21 14:53:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9592 states to 9592 states and 14166 transitions. [2021-12-21 14:53:58,763 INFO L78 Accepts]: Start accepts. Automaton has 9592 states and 14166 transitions. Word has length 113 [2021-12-21 14:53:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:58,764 INFO L470 AbstractCegarLoop]: Abstraction has 9592 states and 14166 transitions. [2021-12-21 14:53:58,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9592 states and 14166 transitions. [2021-12-21 14:53:58,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:53:58,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:58,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:58,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:53:58,769 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:58,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:58,770 INFO L85 PathProgramCache]: Analyzing trace with hash -785614628, now seen corresponding path program 1 times [2021-12-21 14:53:58,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:58,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128709542] [2021-12-21 14:53:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:58,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:58,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:58,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:53:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:58,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:53:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:58,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:53:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:58,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:53:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:58,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:58,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128709542] [2021-12-21 14:53:58,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128709542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:58,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:58,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:58,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090318883] [2021-12-21 14:53:58,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:58,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:58,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:58,832 INFO L87 Difference]: Start difference. First operand 9592 states and 14166 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:54:00,036 INFO L93 Difference]: Finished difference Result 18466 states and 28477 transitions. [2021-12-21 14:54:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:54:00,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:54:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:54:00,067 INFO L225 Difference]: With dead ends: 18466 [2021-12-21 14:54:00,067 INFO L226 Difference]: Without dead ends: 11672 [2021-12-21 14:54:00,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:54:00,085 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 879 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:54:00,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 1315 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:54:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11672 states. [2021-12-21 14:54:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11672 to 9592. [2021-12-21 14:54:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9592 states, 8253 states have (on average 1.4581364352356718) internal successors, (12034), 8328 states have internal predecessors, (12034), 825 states have call successors, (825), 414 states have call predecessors, (825), 512 states have return successors, (1274), 883 states have call predecessors, (1274), 821 states have call successors, (1274) [2021-12-21 14:54:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9592 states to 9592 states and 14133 transitions. [2021-12-21 14:54:00,588 INFO L78 Accepts]: Start accepts. Automaton has 9592 states and 14133 transitions. Word has length 113 [2021-12-21 14:54:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:54:00,589 INFO L470 AbstractCegarLoop]: Abstraction has 9592 states and 14133 transitions. [2021-12-21 14:54:00,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 9592 states and 14133 transitions. [2021-12-21 14:54:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:54:00,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:54:00,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:54:00,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:54:00,594 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:54:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:54:00,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1556348194, now seen corresponding path program 1 times [2021-12-21 14:54:00,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:54:00,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699697419] [2021-12-21 14:54:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:54:00,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:54:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:54:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:54:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:54:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:54:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:54:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:54:00,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:54:00,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699697419] [2021-12-21 14:54:00,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699697419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:54:00,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:54:00,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:54:00,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776343119] [2021-12-21 14:54:00,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:54:00,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:54:00,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:54:00,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:54:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:54:00,678 INFO L87 Difference]: Start difference. First operand 9592 states and 14133 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:54:03,415 INFO L93 Difference]: Finished difference Result 29170 states and 45083 transitions. [2021-12-21 14:54:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:54:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:54:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:54:03,465 INFO L225 Difference]: With dead ends: 29170 [2021-12-21 14:54:03,465 INFO L226 Difference]: Without dead ends: 22378 [2021-12-21 14:54:03,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:54:03,484 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1137 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:54:03,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 2204 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 14:54:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22378 states. [2021-12-21 14:54:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22378 to 16408. [2021-12-21 14:54:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16408 states, 14397 states have (on average 1.4928110022921441) internal successors, (21492), 14504 states have internal predecessors, (21492), 1273 states have call successors, (1273), 606 states have call predecessors, (1273), 736 states have return successors, (2272), 1363 states have call predecessors, (2272), 1269 states have call successors, (2272) [2021-12-21 14:54:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16408 states to 16408 states and 25037 transitions. [2021-12-21 14:54:04,412 INFO L78 Accepts]: Start accepts. Automaton has 16408 states and 25037 transitions. Word has length 113 [2021-12-21 14:54:04,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:54:04,412 INFO L470 AbstractCegarLoop]: Abstraction has 16408 states and 25037 transitions. [2021-12-21 14:54:04,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand 16408 states and 25037 transitions. [2021-12-21 14:54:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:54:04,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:54:04,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:54:04,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:54:04,422 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:54:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:54:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2142624416, now seen corresponding path program 1 times [2021-12-21 14:54:04,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:54:04,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141039018] [2021-12-21 14:54:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:54:04,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:54:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:04,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:54:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:04,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:54:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:04,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:54:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:04,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:54:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:04,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:54:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:54:04,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:54:04,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141039018] [2021-12-21 14:54:04,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141039018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:54:04,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:54:04,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:54:04,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693388188] [2021-12-21 14:54:04,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:54:04,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:54:04,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:54:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:54:04,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:54:04,492 INFO L87 Difference]: Start difference. First operand 16408 states and 25037 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:54:06,178 INFO L93 Difference]: Finished difference Result 33826 states and 53362 transitions. [2021-12-21 14:54:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:54:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:54:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:54:06,296 INFO L225 Difference]: With dead ends: 33826 [2021-12-21 14:54:06,296 INFO L226 Difference]: Without dead ends: 20216 [2021-12-21 14:54:06,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:54:06,319 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 877 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:54:06,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 1306 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:54:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20216 states. [2021-12-21 14:54:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20216 to 16408. [2021-12-21 14:54:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16408 states, 14397 states have (on average 1.4882961728137807) internal successors, (21427), 14504 states have internal predecessors, (21427), 1273 states have call successors, (1273), 606 states have call predecessors, (1273), 736 states have return successors, (2272), 1363 states have call predecessors, (2272), 1269 states have call successors, (2272) [2021-12-21 14:54:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16408 states to 16408 states and 24972 transitions. [2021-12-21 14:54:07,297 INFO L78 Accepts]: Start accepts. Automaton has 16408 states and 24972 transitions. Word has length 113 [2021-12-21 14:54:07,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:54:07,298 INFO L470 AbstractCegarLoop]: Abstraction has 16408 states and 24972 transitions. [2021-12-21 14:54:07,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:07,298 INFO L276 IsEmpty]: Start isEmpty. Operand 16408 states and 24972 transitions. [2021-12-21 14:54:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:54:07,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:54:07,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:54:07,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:54:07,307 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:54:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:54:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash 193768094, now seen corresponding path program 1 times [2021-12-21 14:54:07,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:54:07,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050292304] [2021-12-21 14:54:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:54:07,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:54:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:54:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:07,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:54:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:07,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:54:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:07,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:54:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:07,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:54:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:54:07,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:54:07,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050292304] [2021-12-21 14:54:07,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050292304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:54:07,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:54:07,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:54:07,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382499839] [2021-12-21 14:54:07,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:54:07,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:54:07,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:54:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:54:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:54:07,384 INFO L87 Difference]: Start difference. First operand 16408 states and 24972 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:54:10,898 INFO L93 Difference]: Finished difference Result 53394 states and 83975 transitions. [2021-12-21 14:54:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:54:10,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:54:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:54:11,016 INFO L225 Difference]: With dead ends: 53394 [2021-12-21 14:54:11,016 INFO L226 Difference]: Without dead ends: 39786 [2021-12-21 14:54:11,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:54:11,051 INFO L933 BasicCegarLoop]: 685 mSDtfsCounter, 1176 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 1877 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:54:11,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1208 Valid, 2166 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1877 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:54:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39786 states. [2021-12-21 14:54:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39786 to 30072. [2021-12-21 14:54:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30072 states, 26749 states have (on average 1.5094022206437623) internal successors, (40375), 26920 states have internal predecessors, (40375), 2137 states have call successors, (2137), 990 states have call predecessors, (2137), 1184 states have return successors, (4722), 2291 states have call predecessors, (4722), 2133 states have call successors, (4722) [2021-12-21 14:54:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30072 states to 30072 states and 47234 transitions. [2021-12-21 14:54:12,781 INFO L78 Accepts]: Start accepts. Automaton has 30072 states and 47234 transitions. Word has length 113 [2021-12-21 14:54:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:54:12,781 INFO L470 AbstractCegarLoop]: Abstraction has 30072 states and 47234 transitions. [2021-12-21 14:54:12,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand 30072 states and 47234 transitions. [2021-12-21 14:54:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:54:12,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:54:12,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:54:12,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:54:12,796 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:54:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:54:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2070250912, now seen corresponding path program 1 times [2021-12-21 14:54:12,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:54:12,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270581651] [2021-12-21 14:54:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:54:12,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:54:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:12,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:54:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:12,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:54:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:12,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:54:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:12,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:54:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:12,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:54:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:54:12,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:54:12,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270581651] [2021-12-21 14:54:12,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270581651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:54:12,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:54:12,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:54:12,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782573985] [2021-12-21 14:54:12,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:54:12,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:54:12,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:54:12,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:54:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:54:12,877 INFO L87 Difference]: Start difference. First operand 30072 states and 47234 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:54:18,853 INFO L93 Difference]: Finished difference Result 101682 states and 163611 transitions. [2021-12-21 14:54:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:54:18,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:54:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:54:19,110 INFO L225 Difference]: With dead ends: 101682 [2021-12-21 14:54:19,111 INFO L226 Difference]: Without dead ends: 74410 [2021-12-21 14:54:19,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:54:19,182 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 1094 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:54:19,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 2189 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:54:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74410 states. [2021-12-21 14:54:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74410 to 57336. [2021-12-21 14:54:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57336 states, 51453 states have (on average 1.522457388296115) internal successors, (78335), 51752 states have internal predecessors, (78335), 3801 states have call successors, (3801), 1758 states have call predecessors, (3801), 2080 states have return successors, (11016), 4083 states have call predecessors, (11016), 3797 states have call successors, (11016) [2021-12-21 14:54:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57336 states to 57336 states and 93152 transitions. [2021-12-21 14:54:22,877 INFO L78 Accepts]: Start accepts. Automaton has 57336 states and 93152 transitions. Word has length 113 [2021-12-21 14:54:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:54:22,877 INFO L470 AbstractCegarLoop]: Abstraction has 57336 states and 93152 transitions. [2021-12-21 14:54:22,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 57336 states and 93152 transitions. [2021-12-21 14:54:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 14:54:23,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:54:23,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:54:23,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:54:23,148 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:54:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:54:23,148 INFO L85 PathProgramCache]: Analyzing trace with hash 191119966, now seen corresponding path program 1 times [2021-12-21 14:54:23,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:54:23,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812347275] [2021-12-21 14:54:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:54:23,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:54:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:23,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:54:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:23,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 14:54:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:23,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:54:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:23,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:54:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:23,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:54:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:54:23,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:54:23,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812347275] [2021-12-21 14:54:23,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812347275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:54:23,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:54:23,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:54:23,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997882691] [2021-12-21 14:54:23,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:54:23,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:54:23,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:54:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:54:23,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:54:23,240 INFO L87 Difference]: Start difference. First operand 57336 states and 93152 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:54:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:54:33,397 INFO L93 Difference]: Finished difference Result 195890 states and 324939 transitions. [2021-12-21 14:54:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:54:33,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-21 14:54:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:54:33,965 INFO L225 Difference]: With dead ends: 195890 [2021-12-21 14:54:33,965 INFO L226 Difference]: Without dead ends: 141354 [2021-12-21 14:54:34,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:54:34,076 INFO L933 BasicCegarLoop]: 676 mSDtfsCounter, 1100 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:54:34,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 2157 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]